From NASA's Total Eclipse 2017 website: "On Monday, August 21, 2017, all of North America will be treated to an eclipse of the sun. Anyone within the path of totality can see one of nature’s most awe inspiring sights - a total solar eclipse. Observers outside this path will still see a partial solar eclipse where the moon covers part of the sun's disk." (Florida falls in the partial eclipse path.)
The maximum eclipse visible in the Miami area will occur at 2:58 p.m, with 80 percent of the sun’s surface shadowed by the moon. This is what it will look like from Miami (from timeanddate.com).
SAFE VIEWING: Experts emphasize that during a partial eclipse, it is NOT safe to look directly at the eclipse with the naked eye. Regular sunglasses will NOT be safe. You must use special eclipse viewing glasses, view it via an easy-to-make pinhole projector or look at it through a telescope with a special filter.
Can't make it to a solar eclipse viewing location? Watch NASA's Eclipse 2017 Live video stream.